生态学报2001，Vol.21Issue(2)：244-248,5.
马桑结瘤固氮与光合作用的关系
Relationship between nitrogen fixation and photosynthesis of Coriaria sinica
杨忠 1罗辑 1王道杰1
作者信息
- 1. 中国科学院,水利部成都山地灾害与环境研究所,
- 折叠
摘要
Abstract
Nodulation, Nfixing activity and total nitrogen fixation per plant of Coriaria sinica were positively correlated with leaf area and photosynthesis per plant of the host. The host with higher leaf area and capacity of photosynthesis had a higher capacity of nitrogen fixation with higher nodule and N\|fixing activity. N\|fixing activity of C. Sinica nodule showed a daily variation model with a higher level (20.2μmol C2H2/g.h) in the day and a lower level (9.2μmol C2H2/g.h) in the night. The diurnal fluctuation in N\|fixing activity of C. Sinica seedling nodule was demonstrated mainly ascribed to photosynthesis of the host by an experiment, in which soil temperature variation was hold within 3.2℃ (20±1.6℃), and nearly 2 fold increase (10～19μmolC2H2/g.h) in acetylene reduction by C. Sinica nodule at midday compared with midnight was measured. However, changes in soil temperature and moisture appeared to be the important factors affecting daily changes in N\|fixing activity of C. Sinica seedling nodule. Shade or shortage of light made the N\|fixing activity reduced largely due to the decreased photosynthetic rate of the host. When light was shaded by 40% by seven days, photosynthetic rate and N-fixing activity of C. Sinica reduced by 26.56% and 25.96%. When light was shaded by 70%, photosynthetic rate and N-fixing activity reduced by 38.02% and 79.43%.关键词
马桑/结瘤/固氮/光合作用分类
农业科技引用本文复制引用
杨忠,罗辑,王道杰..马桑结瘤固氮与光合作用的关系[J].生态学报,2001,21(2):244-248,5.
